Hi simba, I'm sorry but it's not really clear to me yet what you're trying to do here..

By "extension" do you mean you want the red part to increase in length until it matches the rest of the other larger part?

Or do you mean that red part is already the extension that you want to have and you are only focused on trying to blend that with the larger part?

- Michael

You might try surface control point editing for what you're describing.

Run Edit > Separate on your part, then run ShrinkTrimmedSrf on it (push Tab and then type ShrinkTrimmedSrf and push enter), then use Edit > Show pts to turn on control points, move only these points over to modify just a range of the surface:






Use Edit> Add pt to add more points to the surface to localize the deformation effect to a smaller region if wanted.


Otherwise if you want to smoothly blend your existing separately created protrusion you'll be looking at using either Fillet or Blend to do that, but it's kind of an awkward position how it's currently situated trying to stick out of a tightly bent area and kind of not fully submerged into it either.

- Michael

Hello again,

the red sketch is the envisioned result. I've attached another file which should give a better idea of the requirements.

Basically I need an almost L shaped extension of the edge like the red shape which extends the upper surface like indicated in green and blends into the side (the upper surface points to other parts of my design - blue arrows). At he end the extension should be 4mm thick.

The existing shape must only be modified near the edge for a defined length so working with surface points doesn't work as this would change the shape of the original part. It would be ok to cut the edge if e.g. blend would be part of the solution.

I hope that's a clearer explanation.

S.

Hi simba, re:

> so working with surface points doesn't work as this would change the shape of the original part.

The amount of disturbance of the original part can be reduced if you insert additional points into the surface, see the attached 3DM file for an example.





The surface retains the same overall shape, it's only changed in shape in the localized area around the moved control points.

That's probably the easiest way to get the seamless and smooth type qualities that you were asking about originally.

If you want to build something as a separate part you're probably looking at cutting away some holes in between the pieces and doing Blend, but your case here with the very tightly bent shape right in the area you want to blend from will probably make that rather difficult.

- Michael